This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 373 |
| 1 | 3797 |
| 2 | 37337 |
| 3 | 37397 |
| 4 | 373379 |
| 5 | 831373 |
| 6 | 973373 |
| 7 | 3733739 |
| 8 | 8313733 |
| 9 | 9973331 |
| 10 | 9721373 |
| 11 | 52313797 |
| 12 | 73313797 |
| 13 | 97337333 |
| 14 | 99793373 |
| 15 | 373373977 |
| 16 | 831373379 |
| 17 | 799733317 |
| 18 | 974313797 |
| 19 | 991733137 |
| 20 | 7331337337 |
| 21 | 3797193373 |
| 22 | 9719337973 |
| 23 | 9917331373 |
| 24 | 9793733797 |
| 25 | 9974331373 |